I am a huge fan of kayak fishing, i no a lot of would say that someone that goes out on a kayak that just sits off the water a little crazy, maybe it is but it is a lot of fun. My favourite fish to catch on the kayak would be long tail tune or also known as northern bluefin tuna. It is so much fun when your just paddle around couple km out to see and then all of a sudden the water erupts with faith tuna and sharks getting amongst as well. great thing is that the Kayak does not seem to scare the fish unlike a boat. You are able to get right in the school while fish are going crazy all around you.
Rods i use are normal the 17 lb. mark with a 3500 or 4000 reel with 20 lb. braid and a 30-40 lb. leader. When the school has started to go crazy i cast little sludges into them trying to imitate the bait. then reel them back. 8 of 10 cast will occur with hook ups. The sludges i use come with treble hooks which are good cause they have a high hook up rate but i have a lot of them pop, so i am a big fan of a circle single hook.
When hooked it is a great feel of getting towed around by a fish that is about 15kg, plus the kayak also creates more drag. Every fish i have caught on my kayak has been way more fun then the equivalent i have caught on a boat. I have one main rule but never bleed the fish while out there. Next season i am hope to try this method with a hand line, will make for a heap of fun.
So to sum up i advise that everyone try's kayak fishing, you will have a blast.
Get out there.